Transformer



J. C. ARMOR April 6, 1926.

TRANSFORMER Filed Dec. '7, 1921 I N VENTOK Patented r. 6, 1926.

UNITED STATES P TENT orricg alums c. ABMOR, or wns'r VIEW BOROUGH, rnNNsY'LvAiim.

TRANSFORMER. I

Application filed December '7, 1921. Serial No. 520,554.

To all whom it may concern:

Be 1t known that I, JAMES C. AnMoR, a

' citizen of the United States, and residing in the borough of WVest View, in the county of Allegheny and State of Pennsylvania, have invented or discovered new, useful, and Improved Transformers, of which the follow-' ing is a specification. v J

My invention consists in a new and improved electrical transformer.

The object which I have in'view is the provision of an alternating current transformer, more especially intended for use in electric welding. j a I Generally speaking my improved trans-' former is characterized b the 'slidable.

mounting of one of the windm'gs, preferably the secondary winding, in relation to the other winding, whereby the amount of current induced 1n the secondary winding may be regulated to suit the task at hand. Means are provided whereby'the workman mayadjust the movable winding so thatthe -trans-- former will vdeliver the amount of current desired. I place the fixed winding. above the 'slid-' able winding, whereby the "force of gravity.

or tank be1n shown in section; Fig. 2. is a 4 is a sectional view 0f the top along. the line in'F .1

and the repulsion between the windings act in the-same direction, and thus prevent chat-- tering or movement of the winding. This insures uniformity of current. 1

Novel features of construction and 'ar-L rangement of arts will appear from the. following descr1ption.

In the accompanying drawings, Fig. 1 is a side elevation of atransformer embodying the principles of my invention, themasing plan view 0 the same with the cover removed; Fig. 3 is a sectional view taken along the line III--III in. Fig. 1,. and- Fig.

plate taken, I g.1. '1. The following is a detailed: description of the drawings-f 2 i' I f A represents the transformer core shown I made up of a plurality ofmetal laminae and I about whose center leg l-the primary coil B i and the secondary-coil are both shown wound.

The laminae are. shown clamped together to form the coreingthe followlng manner.

2 represents a; pair'- whichfi o the iippe laminae and have ,-'-their protruding ends I clampedtogetherbyjthemeach bolts 3; 4

ren

o posed angle-bars (is-or the two outercircular sea represents a pair of similar angle-bars for thebottom of the core clamped together by means of the reach bolts 5. 6 represents vertical reach bolts which connect 'each' of) the upper angle-bars with the corresponding v lower angle-bars. \Vhen the transformer is contained. in an outer container or tank, .as

' at D, the ends of the'vertical reach bolts 6 may extend through the.bottom of the tank and be used for attaching the supporting bars 7-upon which the tank stands.

For the sakefof illustration I haveshown' thetransfonner; mounted in (an oil-tight tank for oil-coohng, but if desired an open work or ventilated casing. may be id.-

spool 10, which is vert1cally1slidable on-the core leg 1, so that the secondary winding may be shifted in relation to .the primary winding. Y I '11 represents a pair of opposed hangers having their lower ends" secured to-the' spool 10 and havinggtheir upperv ends prov ded 1 .with'the eyes' 12 to which are secured the lower ends of the twin cables 13- which ex tend up pastthe primary winding B, and

-.-theninwardly through guide openings'14 iii the side of a metal plate E wh ch is ositioned about the core A and preferably olt ed to the top angle-bars 2. .The openings are substantially tangentialto the axis 'of a i the center of theplate E in? i which. fits/the pulley F havin a grooved -perimeter,*the cables 13"being ed partially around the perimeter of the-pulley and their ends secured tosaijd erimeter as by cap" screws, as shown at 15 m FigI-2. The pulley E isZmounted on an axle 16 whose lower, end

is journaledin' the circular holej 17 while-its u per end extends through a hole in the lid G provided with'a stufling box 18 to prevent,

the escape of oil. 1 It is very. advantageous to have the fixed winding above the shdable winding, a's thusthe'. forces of gravity. and "of rep'ulsionbetween the windings act in the same direction and therefore there is'an absence, of chatter- 3 ing or movement on the part of the slidablef. winding which would bepresent were the forces of gravity and repulsion exerted in opposite directions. In the latter case it would not be practical to freely suspend the slidable wihding, but rigid supporting means of a character to successfully resist the effect of the opposed forces would berequired.

The lid G which incloses the tank D is bolted, as at 19, to the top edge flange of the tank, and, as at 20, to the plate E.

. I The upper protruding end of the axle lfi has pinned thereon the cap collar 21 having a pair of horlzontally extending and spaced apart pierced cars 22 between which is pivotally connected the inner end of the crank handle 23 whichis provided, near its outer end with the depending knife lug 24 adapted to fit the teeth of an arc-shaped racltfflfi mounted on the lid G and concentric with gagement of its lug 24 with the rack 25.

It is evident that the workman is enabled to thus regulate the amount of current to a nicety to suit the piece of work in hand.

What I desire to claim is 1. In an alternating current transformer for arc-welding and like purposes, the combination of a vertically disposed core, aprimary winding and a secondary ,windlng mounted on said core, one above the other, the upper of said windings being stationary relative to said core while the lower of said windings is movable on said core to permit current regulation, and means for supporting the lower windingin its adjusted position, whereby the forces of gravity and repulsion operate in the same direction on said lower winding and chattering is prevented.

2. In an alternating current transformer for arc-welding and like purposes, the combination of a vertically disposed core, a primary winding and a secondary winding mounted on said core, 'one above the other, the upper of said windings being stationary relative to said core but the lower winding being movable on said core to permit current regulation, and means for freely suspending the lower winding from above in its adjusted position whereby the forces of gravity and repulsion Work in the same direction. and ehatteringis prevented.

lln an alternating current transformer for arc-welding and like'purposes, the combination of a vertically disposed core, a pnmary winding and .a secondary winding mounted on said core, one above the other, the upper winding being stationary on-said core while the lower winding is movable thereon toward and away from the upper winding for purposes of current regulation, flexible supporting members, a horizontal pulley centrally over the upper winding,to

which the upper ends of the flexible mem bers are attached, a pair of guides for the said member arranged between the pulley and the'lower winding and leading the'said I members tangentially to the pulley, and means for rotating the pulley.

Signed at Pittsburgh, Pa, this 3rd day of December, 1921.

JAMESC. ARMOR. 

